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US 10,328,392 B2Granted
Pleated, tapered, and spiral-wound cross-flow filter element
OwnerScott P. Yaeger, Walter E. Yaegerinventors
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Abstract
Pleated, tapered, and spiral-wound cross-flow filter elements are described. The filter elements have pleated and tapered membrane leaves. The pleated and tapered membrane leaves maintain retentate fluid velocity in high permeate flux applications.
Claims22
A spiral-wound cross-flow filter element comprising:
- a permeate tube;
- and
- a pleated filtration membrane welded to the permeate tube, the pleated filtration membrane comprising a plurality of leaves circumferentially spaced around the permeate tube and spiral-wound around the permeate tube in a uniform direction;
- wherein each leaf comprises:
- a welded inlet edge;
- a welded outlet edge, wherein the length of the welded inlet edge is greater than the length of the welded outlet edge;
- a welded and tapered distal edge extending between the welded inlet edge and the welded outlet edge;
- and
- a proximal end located adjacent to the permeate tube and comprising two folded proximal edges extending between an inlet end of the pleated filtration membrane and an outlet end of the pleated filtration membrane.
6 more elements
A spiral-wound cross-flow filter element comprising:
- a permeate tube;
- and
- a pleated filtration membrane attached to the permeate tube, the pleated filtration membrane comprising a plurality of leaves circumferentially spaced around the permeate tube and spiral-wound around the permeate tube in a uniform direction;
- wherein each leaf comprises:
- an inlet edge;
- an outlet edge, wherein the length of the inlet edge is greater than the length of the outlet edge;
- a tapered distal edge extending between the inlet edge and the outlet edge;
- and
- a proximal end located adjacent to the permeate tube and comprising two folded proximal edges extending between an inlet end of the pleated filtration membrane and an outlet end of the pleated filtration membrane;
- wherein the pleated filtration membrane is attached to the permeate tube at the inlet end and the outlet end of the folded proximal edges between each leaf.
7 more elements
A cross-flow filter comprising:
- a housing;
- a permeate tube located within the housing;
- and
- a pleated filtration membrane attached to the permeate tube and located between the permeate tube and the housing, the pleated filtration membrane comprising a plurality of leaves circumferentially spaced around the permeate tube and spiral-wound around the permeate tube in a uniform direction;
- wherein each leaf comprises:
- an inlet edge;
- an outlet edge, wherein the length of the inlet edge is greater than the length of the outlet edge;
- a tapered distal edge extending between the inlet edge and the outlet edge;
- and
- a proximal end located adjacent to the permeate tube and comprising two folded proximal edges extending between an inlet end of the pleated filtration membrane and an outlet end of the pleated filtration membrane.
7 more elements
Dependencies are inferred from the claim text.